Asphalt seal for metallic window frames



F 1942- H. "r. PEIRISON 2,

ASPHALT SEAL FOR METALLIC WINDOW FRAMES Filed D96. 15, 1938 INVENTOR.

ATT NEY.

Patented Feb. 10, 1942 l ASPHALT SEAL'FOR METALLIC FRAMES WINnoW Harold Peirson, Brooklyn, N. Y. I

Application December 15, 1938, Serial No. 245,894 3 Claims. (01. 189---75) This invention relates to steel window sash that is built into the walls of buildings and it has for an object to prevent the sash from rusting where it is inserted in the wall and thereby prevent it from buckling and fracturing the glass and injuring the wall. An object of the invention is to provide a waterproof shield for the member of the sash which is built into the wall and thereby prevent rusting and another object of-the invention is to provide a yieldable support between the sash and the wall which absorbs expansion and contraction. A further object of the invention is to provide an asphalt shield for the member of the sash engaging the wall which is comparatively inexpensive and which can be applied to the sash as it is built into the wall.

These and other objects of the invention will be more particularly understood from the following specification and the accompanying drawin, in which- I Fig. 1 is a front view of a wall with a steel window sash built therein;

Fig. 2 is a sectional elevation on line 22 of Fig. 1;

Fig. 3 is a sectional detail showing the application of the sash to the wall;

Fig. 4 is a cross-section showing the application of the sash to an iron mullion;

Fig. 5 is a cross section of the asphalt shield which is applied to the rib of the sash entering the wall;

Fig. 6.is a cross-section of the asphalt shield in place on the window frame, and

Fig. 7 shows a strip of asphalt from which the shield may be made.

It is well known that steel or iron window frame sash which are tightly enclosed by the masonry of the wall buckle inwards and fracture the glass and in some cases injure the walls. The main source of this trouble arises from the fact that the member of the sash which is built into the wall has not been properly waterproofed and it is not practical to make this member nonrusting, with the result that, under damp weather conditions, rust quickly develops on the iron surface and it grows layer by layer, forcing the iron outwards and causing the damage referred to. The present invention provides, in a simple and relatively inexpensive way a waterproof shield for the iron adjacent to the wall and a shield which is relatively thick and forms a yielding connection between the iron and the wall. A sash of this type is, of course, painted but paint is not effective in preventing rust, ap-

sets around the iron and there is an unequal shrinkage due to temperature'changes between the'iron and the masonry, the painted surface is partially rubbed off and rust rapidly develops.

In the drawing, the wall is' indicated by H, the window sash by l2 and the window sill by l3, the window being glazed in the usual way at M. Under the accumulated rust conditions referred to, the sash is bowed inwardly on the sides as indicated at a and is bowed upwardly at the sill as indicated at b. This condition is not so pronounced at the top as moisture does not readily accumulate there. The pressure developed due tothis rusting condition is very considerable, causing fracture of the glass, causing binding of a sash that maybe pivoted in the window frame and in some cases cracking the wall.

The preferred form of the invention isillustrated in Fig. 3 in which the frame member I2 of the sash has a leg 22 projecting into a channel in the masonry l3 and is surrounded by a U- shaped shield of asphalt 32. In some constructions the seam between the member l2 and the wall I3 is caulked as indicated at 36 and 31. If desired, the caulking, as indicated at 36, may also be made from a strip of asphalt. The frame member l2 supports the plate glass M as indicated at 2|.

In some cases, windows are installed between mullions and the construction indicated in Fig. 4 may be used for this purpose in which the window frame is applied to the mullion without change from the application to the masonry. 30 indicates a mullion of T-iron to which the bolt 36 clamps the angles 31 and 38. A channel is formed between these angles and the base of the T-iron for the member 22 of the frame enclosed in the asphalt shield 32. This construction provides a free vertical and transverse movement between the mullion and the window frames.

The shield 32 is preferably made from asphalt, that is, a felted material which is saturated with asphalt and which is manufactured in sheets for roofing and other purposes. This material may be made of any thickness desired and can readily be made substantially the same thickness as the iron so that it forms a yieldable connection between the iron and the wall. Asphalt is made in varying degrees of hardness and tackiness and for the purpose of this shield it is preferred that the outer surface of the U-shaped shield be made from theharder grade of asphalt and the inner surface be made from an asphalt that remains relatively tacky and forms an adhesive with the iron 22 when applied as in Fig. 6 with a waterproof seal between the iron and the surface of the shield.

The shield may be made from a strip of asphalt as indicated at 3|, Fig. 7, and folded into the shape shown in Fig. 5, with the legs Of the U closed at 33, thereby protecting the adhesive walls 4| on the inside of the legs. Where necessary, a waterproof adhesive of asphalt or similar material may be applied to the bottom of the U as indicated at 35 so that this material will spread over the legs and form a seal between the iron and the shield as th iron is forced into the shield. The fabric of the shield may be provided with a ridge as indicated at 34 which is flattened out by the iron rib 22 and tends' to draw the legs of the shield into tight engagement with the iron rim. It should be noted that with the apex of the V-groove 34 projecting inwards towards the edge of the rib f the sash, the rib, as it expands, contacts this projection and does not engage the sides where the bend is formed so that while the sides are secured by an adhesive to the rib, the tendency for the rib to shear the cover at these edges is reduced. The U- shaped cover is made from a single sheet of uniform thickness cut into strips and formed to shape and can be made at a low cost. The felted asphalt implies an asphalt with a fabric body that will maintain its shape in use. Th ridge at 34 enlarges the yielding surface at the edge of the strip.

The shield is made in lengths is readily portable and may be applied to the sash by the manufacturer of the sash, or it may be applied on the ground as the sash is built into the wall. For this reason it is desirable that the adhesive remains tacky and that it forms a waterproof seal with the iron without the application of heat. The masonry is built around the rib of the sash and around the shield and sets and becomes rigid but the use of th shield enables the sash to be removed from the wall without injury to the wall and to be replaced by another sash having a shield.

The tacky side of the asphalt is applied to the inside surface of the U-shaped shield and does not interfere with the handling and shipping of the shield.

The protected rib is built directly into the masonry with the shield secured thereto and is not injured by the dampness of the masonry. This shield is relatively inexpensive to apply and is easily adapted to different lengths of sash.

Having thus described my invention, I claim:

1. A waterproof protection for metallic window sash having a rib built into the masonry of a wall, comprising a strip of felted asphalt having one surface made of harder asphalt than the other and bent into a U-shape with the softer surface on the inside of the U and applied to the rib of the sash with an adhesive to enclose the rib on the three sides that are in the wall.

2. A metallic window sash having a rib built into the masonry 0f the wall and a U-shaped cover of felted asphalt enclosing said rib on the three sides that are in the wall, the inside of said cover being adhesive to secure the cover to the rib and the outside being non-adhesive.

3. A waterproof protection for the metallic rib of a window sash comprising a u-shaped cover of felted asphalt of uniform thickness with a V- groove at the bend of the U, with its apex projecting inwards towards the edge of the rib and means for securing the sides of the cover to the rib where it encloses the rib.

HAROLD T. PEIRSON. 

